Niagraa Falls Tour Guide

A group of tourists visit the Niagara Falls and are accompanied by a guide.

The guide says "I welcome you all to the Niagara Falls. These are the world's largest waterfalls and the sound intensity of the waterfall is so high that the sound of even 20 supersonic planes passing by can't be heard!"

"Now, may I request that the ladies in the back keep quiet so that we can hear the falls!"